Passive Welding Helmet, Black, Classic MP-10, 8 to 12 Lens Shade Review Mutantra January 21, 2019 January 21, 2019 No Comments on Passive Welding Helmet, Black, Classic MP-10, 8 to 12 Lens Shade Review The passive welding helmet is of nylon construction and it includes magnifying lens holder, 5 outside and 2 inside cover lenses. It is of Classic MP-10 series.